Otherwise, this trilogy is fantastic and represents what's best in the field of SF. The universe is intoxicating, extremely extensive and detailed. The writing quality Drew Karpyshyn pushes compliance (by the way, the three novels are also excellent and added a new facet to the story). I must say that the man is far from a novice like, he participated among others at writing Star Wars KOTOR and Baldur's Gate 2 ... no less.
Graphically, the first episode showing its age but there is a very large patch developed by amateurs to give it a facelift.
The next two episodes by cons are beautiful.
Count a hundred hours to fasten this trilogy.
In short, Mass Effect is now in my opinion one of the major masterpiece of video games and even a masterpiece of SF. It was a real let go of Creve Coeur that the keyboard when finished.
Miss this trilogy would be a very big mistake.